Stainless steel substrate
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTakashi Aisaka, Takashi Kono
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Abstract
The present disclosure provides a stainless steel substrate used for a fuel cell separator that comprises Nb and is excellent in corrosion resistance. The embodiments relate to a stainless steel substrate used for a fuel cell separator, comprising Nb in a solid solution state, and comprising substantially no precipitate of a Nb-containing intermetallic compound.
Claims8
A stainless steel substrate used for a fuel cell separator, comprising Nb in a solid solution state, and comprising substantially no precipitate of a Nb-containing intermetallic compound, wherein the stainless steel substrate is austenitic or austenitic-ferritic duplex.
A fuel cell separator comprising a stainless steel substrate, wherein the stainless steel substrate comprises Nb in a solid solution state, and comprises substantially no precipitate of a Nb-containing intermetallic compound, wherein the stainless steel substrate is austenitic or austenitic-ferritic duplex.
A method for manufacturing a stainless steel substrate for use as a fuel cell separator, comprising:
- heating a stainless steel substrate comprising a precipitate of a Nb-containing intermetallic compound under an inert atmosphere to dissolve the Nb-containing intermetallic compound;
- and
- quenching the stainless steel substrate after the heat treatment.
Dependencies are inferred from the claim text.